Our Reggie is about 7, we think. (adopted).
She has what the vet called a significant heart murmer.
We were concerned about her much needed dental. But the way I feel is, she shouldn't suffer with bad or painful teeth. To me, it's a quality of life issue.
The vet said he would take care, and I believed him. She got antibiotics before the procedure, and after.
Everything went well. Reggie is even more lively since the dental. She plays with the other dogs more. She had to have 4 teeth pulled.
Good luck with whatever you decide to do.